First results from the 3D near-infrared imaging array spectrometer

Niranjan A. Thatte; L. Weitzel; M. Cameron; Lowell E. Tacconi-Garman; Harald Kroker; Alfred Krabbe; Reinhard Genzel

doi:10.1117/12.180081

8 July 1994 First results from the 3D near-infrared imaging array spectrometer

Niranjan A. Thatte, L. Weitzel, M. Cameron, Lowell E. Tacconi-Garman, Harald Kroker, Alfred Krabbe, Reinhard Genzel

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Proceedings Volume 2224, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing V; (1994) https://doi.org/10.1117/12.180081
Event: SPIE's International Symposium on Optical Engineering and Photonics in Aerospace Sensing, 1994, Orlando, FL, United States

Abstract

We present the first astronomical results from the new 3D near IR imaging array spectrometer. These include K band (1.95 to 2.45 micrometers ) spectra and images of nearby starburst galaxies and active galactic nuclei with a spectral resolution of 1000. A special image slicer allows simultaneous spectra and imaging of an 8 arc second field of view. The background limited performance achieved by this instrument represents an order of magnitude reduction in integration time over existing near IR cameras and spectrometers. In addition, subtraction of atmospheric OH lines may be performed with far higher accuracy. We discuss the data reconstruction procedure, with special emphasis on flat fielding and calibration of the detector. This is complicated by the scrambled image format, which results in adjacent image pixels being widely separated on the detector. Small non linearities of the optical elements must also be dealt with carefully. We also discuss future improvements to instrument performance, including a low order adaptive optics system for compensating atmospheric turbulence.

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Niranjan A. Thatte, L. Weitzel, M. Cameron, Lowell E. Tacconi-Garman, Harald Kroker, Alfred Krabbe, and Reinhard Genzel "First results from the 3D near-infrared imaging array spectrometer", Proc. SPIE 2224, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing V, (8 July 1994); https://doi.org/10.1117/12.180081

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